Rally Stock Category
Stock Rear Wheel Drive (SR)
Stock Front Wheel Drive (SF)
Stock All Wheel Drive (SA)
Preparation allowances:
1. All Cars must be equipped as from the manufacturer, with only
factory installed and port‐installed option packages. Options that
were only part of a package must be present with the entire package.
Complete option packages may be installed after purchase of the
vehicle.
2. Tires must be DOT approved. Tires marked ?For competition only?,
?Not for street use? or similar, are not allowed. No part of the tire
may be modified or altered from its original form, either through
addition or subtraction, other than normal wear. Tires must be the
original size plus/minus 20mm cross section and 5% aspect ratio. No
studded tires are permitted unless ice or snow is present. Studded
tires may not be homemade using bolts or screws. Only street‐legal
studs are allowed. Tires may not interfere with any parts of the car
(fenders, fender liners, suspension, etc).
3. Any air filter may be used, but it must fit in the stock location.
4. The additions of protective equipment are allowed with the following
exceptions:
a. The modifications must only provide protection to the car and/or
occupants and provide no performance advantage.
b. Mud flaps may only be made of urethane and other flexible
plastic derivatives (i.e. no carbon‐Kevlar)
c. Skidplates protecting suspension and drivetrain components may
only be made out of metal, composite materials or plastic
derivatives.
d. Driver restraints and roll cage may be added.
e. Additional or replacement hood and trunk latches are permitted.
All latch systems must be secure.
5. Dress‐up and convenience items which do not give a performance
advantage, reduce the weight of the car, or weigh less than the
replaced standard part they are replacing are allowed (i.e. shift knobs,
pedal covers).
6. ABS and/or traction control systems may be electronically/electrically
disabled but not removed.
7. Vehicle lights may be replaced with alternate bulbs and housing.
Auxiliary lights may be added. The total number of lights shall not be
less than standard.
8. Any brake pads may be used.
9. Fuel may be any type of unleaded, E85, or diesel fuel commonly
available at the pump. Alternative fuels must be pre‐approved by the
event RallyCross Safety Steward prior to the event. No other alcohol
fuels or nitrous oxide are allowed.
10. Any clutch disc or pressure plate may be used provided it fits all the
other unmodified, stock components.
11. Exhaust systems from the catalytic converter back may be removed
or replaced with the following requirements:
a. The exhaust must exit to the rear of the driver.
b. The exhaust must comply with local noise restrictions
12. Any type wheel may be used provided it complies with the following:
Wheels must be of the same diameter and width as the OEM wheel.
Wheel offset (backspace) must be within 0.375"(9.5mm) of original
equipment wheel offset.
13. Shocks/dampers may be replaced with OEM or aftermarket
replacement units intended for the specific year make and model
used. The stock spring must be used as it was on the OEM unit. The
spring perch must be factory welded to the damper or use the exact
attachment method and position as OEM. Adjustable dampers are
only allowed if the OEM unit was adjustable and must retain the same
number of adjustments or fewer as OEM. Remote reservoir shocks
are only allowed if they are exact OEM units.
14. The front sway bar may be added, replaced or removed. A
replacement front sway bar may serve no other purpose than
originally intended by the vehicle manufacturer. In the case where
the front sway bar is also a suspension locating link, stock geometry
and methods of attachment must be maintained.
15. Any wheel alignment settings may be used provided the settings can
be accomplished within the unmodified adjustment range as
delivered from the factory. Any alignment techniques allowed by the
factory service manual from the vehicle manufacturer may also be
used.
16. Aftermarket replacement batteries are allowed provided they are the
same type, group size and location as originally equipped.
17. Spare tires, tools, jacks, and any related covers may be removed.
Rally Prepared Category
Prepared Rear Wheel Drive (PR)
Prepared Front Wheel Drive (PF)
Prepared All Wheel Drive (PA)
Preparation allowances:
1. All Rally Stock category modifications are allowed.
2. Any sway bars and their mounting may be used or removed.
3. Any brakes may be used.
4. Exhaust systems from the cylinder head exhaust ports back May be
replaced with any material with the following requirements:
a. The exhaust must exit to the rear of the driver.
b. The exhaust must comply with local noise restrictions.
5. The intake system upstream from the throttle body may be replaced
with any material. Forced induction components cannot be changed
or added (turbochargers, superchargers, intercoolers). Turbocharger
boost regulation systems, either electronic or mechanical, may be
modified or replaced.
6. Short shift kits are allowed.
7. Front and/or rear strut tower bars are permitted.
8. Any dampers may be used but the damper must mount to the original
mounting position using unmodified mounting points. Springs may
also be replaced, but they must be of the same type and use original
mounting points. Threaded collars and camber plates are allowed.
9. Electronic engine controls may be modified or piggybacked, but not
replaced.
10. Any tire is allowed except homebuilt studded tires.
11. Any front seat may be used, provided the seating surface is fully
upholstered. This does not permit the substitution of a passenger?s
seat with a child or miniature seat of any type. Any substituted
passenger?s seat must be sufficiently large and strong to be capable
of adequately accommodating an adult, such that it could be used as
the driver?s seat. Cars may have no fewer than the original number of
seats. Seat belts are required in all cars; however; the number of
attachment points may not be less than originally equipped.
Installation of shoulder and lap belts is strongly recommended.
Additional belts must be installed per the belt manufacturer's
recommendations.
12. Any non‐metallic bushing is allowed.
13. Wheels are unrestricted.
14. On carburetor equipped cars, any bolt on intake manifold or
carburetor may be used. Any air filter system and associated parts
may also be used.
15. Vehicles may substitute one differential with a mechanically governed
limited slip or locking unit of an alternate type. This includes spools
and welded stock differentials. This does not allow the use of a
differential with external controls (electronic or otherwise) to
regulate slip or locking. Differentials must be contained in a stock
unmodified housing/third member with stock or optional ring and
pinion ratios available for the specific model, body, and year of the
vehicle only. 4wd vehicles may not substitute more than one
differential with an alternate type.
16. Batteries may be substituted with any type. Relocation of the battery
or batteries within the engine compartment or trunk area/luggage
compartment behind the rearmost seats is permitted. Longer battery
cables may be substituted to permit relocation and holes may be
drilled to accommodate mounting of the battery and cables.
17. Accessory drive pulleys and belts may be replaced.
18. Any clutch disc or pressure plate may be used.
19. On automatic transmission vehicles, any torque converter may be
used.